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Xia Yuzhu said: The fever of Heat Malaria (Re Nue) is indistinguishable from Cold Damage (Shang Han), making it the most difficult to differentiate. Without true transmission and wisdom's eye, treating Heat Malaria as Cold Damage or Convulsive Disease (Jing Feng) results in errors in nine out of ten cases. Even if one asks physicians across the world who can distinguish this syndrome, I know there will be few. I have examined my father's medical records, where he cured thousands of patients; the diagnostic methods are recorded in great detail, and the treatments seem ordinary, yet they are invariably effective. This is what the ancients meant by "when herbs are used appropriately, they achieve miraculous effects." Following my father's differentiation method, I recognize it at a glance, with confidence akin to looking at one's gallbladder through double mirrors (seeing clearly), curing with a single prescription. People marvel, saying, "Miraculous disease, miraculous doctor." However, there is nothing miraculous; people simply fail to differentiate accurately, hence the ineffectiveness of medication. Now, I reveal the secret of differentiating malaria to my colleagues, so that infants may suffer less from Heat Malaria, thus perhaps absolving myself before the famous physician Lu Yi.

The fever of Cold Damage persists without increasing or decreasing by even a fraction until evening, uninterrupted throughout, presenting as a steady, flat fever without convulsions or fright. This is the fever of Cold Damage. The fever of Convulsive Disease resembles that of Cold Damage but is accompanied by convulsions. This is because tendons belong to the Liver; when Liver Wind moves internally, it causes cramping. When Liver Wind enters the Spleen, the Spleen stirs phlegm, leading to fright. This distinguishes the fever of Convulsive Disease.

Although the fever of Heat Malaria appears similar, the symptoms differ. Some children drink boiling tea or soup, or cry and shout loudly, with sweat necessarily appearing on the head and face. Once sweat appears, the fever subsides by two or three points, only to return to its original state shortly after. This is Heat Malaria—this is the first method of differentiation.

From morning to night, there is always one period when the condition worsens, such as the eyes rolling up or limbs twitching. After a twitch and subsequent sweating, the fever subsides, but heat remains in the abdomen. Shortly after, the fever returns, occurring daily. This is definitely Heat Malaria—this is the second method of differentiation.

There must be phlegm in the throat; crying induces vomiting, and upon vomiting, phlegm is expelled. This is definitely Heat Malaria. In contrast, in Convulsive Disease, phlegm stagnates in the Lungs and does not reach the Stomach, so how could it be vomited? This is the third method of differentiation.

Physicians with spiritual hearts and wise eyes need not differentiate these; a single glance suffices. The complexion is yellowish yet not truly yellow, whitish yet not truly white; spirit seems fatigued yet not truly fatigued; the face is dull without luster; pores are loose but not standing erect; the eyes look at people as if healthy. Thus, Heat Malaria is evident. This syndrome often occurs between the fifth and eighth months. Qing Pi Yin (Clear the Spleen Decoction) is invariably effective. For those who have been ill for one or two days, five or six doses are required; for those ill for five or six days, three or four doses suffice. Some are mistakenly treated as Convulsive Disease or Cold Damage, lasting ten, twenty days, or even a month. In such cases, only one or two doses are needed. Do not change the formula due to lack of immediate effect, lest you cause death by error. Those unaware may mistake deer for horses, but in my father's and my generations of treatment, the distinction has been clear as black and white. Now, passing on the golden needle (metaphor for secret knowledge), solving problems becomes as easy as embroidering mandarin ducks.

Another type of Heat Malaria involves once-daily fever with a fixed schedule, characterized by no chills, starting with fever only, either from afternoon until midnight, resolving with sweat, though heat in palms and abdomen may not fully resolve. If it does not start in the afternoon, do not be rigid; still use Qing Pi Yin. For the above-mentioned Heat Malaria, if the child is emaciated and weak, and after fever subsides becomes critically weak or near death, Liu Jun Zi Tang (Six Gentlemen Decoction) must be used to tonify Spleen Qi.

Regarding subsequent miscellaneous cases, I mostly drew from existing texts, differentiating only where doubts arose, recording empirical successes, deleting ineffective ones, and devising treatments for symptoms not previously recorded, accounting for about 40-50% of the content. Only the differentiation methods for Convulsive Disease, Heat Malaria, and Umbilical Wind were unprecedentedly transmitted; massage techniques were also corrected. Over seventy years, my father and I gained insight from diseases, entering a state of spiritual clarity, recognizing instantly and curing with one prescription. Is this not what is meant by "before us, no ancients; after us, no moderns"? Now presenting the authentic edition of Lanting (Orchid Pavilion), do not treat it as mediocre work.

Generally, herbal prescriptions contain one to three ingredients, up to eight or nine. However, prescriptions for Convulsive Epilepsy may contain up to nineteen ingredients. Why? Because pathogenic factors overwhelm, affecting all organs, penetrating deep into the interior, harming everywhere—from the vertex to the Jueyin channel, spreading to hands, feet, abdomen, and heart. Therefore, troops for attacking fortifications and quelling chaos cannot be lacking, just as Wang Jian knew that conquering Chu required six hundred thousand troops. Pediatricians must not treat Tian Bao Cai Wei Tang (Heavenly Preservation and Gathering the Fern Decoction) as a universal hat for everyone to wear.